Countersunk Washer 1/4in x 1in 10pk

The Countersunk Washer 1/4in x 1in 10pk from ALLSTAR PERFORMANCE is an essential fastener accessory designed for precision assembly work in automotive, machinery, and structural applications. These aluminum washers feature a countersunk profile that allows fastener heads to sit flush with surface material, eliminating protrusions and creating a clean, finished appearance. Commonly used in engine builds, bracket installations, and custom fabrication, this 10-pack provides reliable washers for both professional shops and enthusiast builders who demand consistent quality.

Each washer measures 1/4 inch inner diameter (ID) with a 1 inch outer diameter (OD) and 0.188 inch thickness, engineered to distribute fastener load evenly while the countersunk design accommodates conical screw heads. Manufactured in lightweight natural aluminum, these washers resist corrosion better than standard steel alternatives and remain durable under vibration and thermal cycling—critical for engine compartments and exhaust system work. The precisely machined countersunk geometry ensures proper seating, preventing fastener rotation and protecting underlying surfaces from damage during assembly and disassembly cycles.

This 10-pack is ideal for technicians restoring classic vehicles, performance engine builders, and fabricators tackling small-batch projects where appearance and functionality matter equally. The countersunk design is particularly valuable in visible mounting applications—carburetor brackets, intake manifolds, valve covers, and trim panels—where flush fastening eliminates visual catch points. Aluminum construction makes these washers suitable for both ferrous and non-ferrous fastener combinations, and the compact pack size ensures adequate supply for typical repair and assembly jobs without excess inventory.